SMD marking code “K1” — candidate parts
Small packages rarely print the full part number. The marking below maps to these part numbers — verify against the package, pin count and the manufacturer's datasheet before ordering.
Candidate part numbers
| Part number | Manufacturer | Package | Mapping basis | |
|---|---|---|---|---|
| 2SK2741 | TOS | SOT-89 | Public marking directory | |
| BAP51-02 | PHI | SOD-523 | Public marking directory | |
| BCW71 | FSC | SOT23 | Public marking directory | |
| BZX384-B2V4 | PHI | SOD-323 | Public marking directory | |
| CMOZ43V | CSC CENTRAL SEMIC.CORP.* | SOD-523 | Public marking directory | |
| HSMP-3831 | HP | SOT23 | Public marking directory | |
| MAX810LTR | MAX* | SOT-23 | Public marking directory | |
| MMBZ5251B | NSC | SOT-23 | Public marking directory | |
| MMBZ5251BW | DIODES | SOT-323 | Public marking directory | |
| MMSZ5251B | MCC | SOD-123 | Public marking directory | |
| MMSZ5251BS | DIODES | SOD-323 | Public marking directory | |
| MMSZ5251BS | DIODES | — | Public marking directory | |
| MMSZ5252B | DIODES | — | Public marking directory | |
| MMXZ5252B | MCC | SOD-323 | Public marking directory | |
| R3111N212C | RICOH* | SOT-23 | Public marking directory | |
| R3114Q481C | RICOH* | SC-82AB | Public marking directory | |
| R5426D102AA | RICOH* | — | Public marking directory | |
| R5426N102AA | RICOH* | SOT-23-6 | Public marking directory | |
| RN2962FS | TOS | — | Public marking directory | |
| RN5RG31AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5RY211A | RICOH* | SOT-23-5 | Public marking directory | |
| 2SK57-1 | — | SOT-23 16fa - 3a Nec | Public marking directory | |
| A1/K2 | — | — | Public marking directory | |
| A102WFT-3.3 | — | SOT-23 16cg VR1 3b Adt | Public marking directory | |
| ELM7641HAB | — | SOT-23 16vdc VD7 3d Elm | Public marking directory | |
| MMSZ52351 | — | SOD-123 | Public marking directory | |
| R1131D281A5 | — | — | Public marking directory | |
| R3130N29EA3 | — | SOT-23 | Public marking directory | |
| RP103Q281D5 | — | SC-82AB | Public marking directory | |
| RT9167A-16CBR | — | SOT-23-5 | Public marking directory |
How these mappings are compiled: from public SMD marking directories and from our own stock records (marked Stock-record verified). We keep the original reference of every row internally so any mapping can be traced on request.
Markings are indicative only: the same code can denote different parts across manufacturers and packages. Always confirm with the physical batch marking and the original datasheet.
* Manufacturer derived from the part-number family (some directory entries carry no manufacturer) — treat it as a lead, not a datasheet fact.
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